Answers are grounded in this paper and cite their sources.
Total ozone measurements by the Total Ozone Mapping Spectrometer (TOMS) aboard the Nimbus 7 satellite show the reappearance in 1986 of the extreme springtime Antarctic ozone minimum during September and October. The minimum total ozone amounts descended to 156 Dobson Units; the minimum October average of 185 DU was 27 DU higher than the corresponding average in 1985 and 5 DU less than the 1984 average. This behavior indicates a pause in the downward trend of recent years.
No takes yet. Share an insight, caveat, or question.
Krueger et al. (1987) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: